Top 20 MCP Servers for AI Assistants
A curated catalog of the most popular and useful MCP servers, organized by category. Each entry includes what it does, the npm package name, and required configuration.
MCP Config Builder
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Official MCP servers
Anthropic maintains a set of official reference servers under the @modelcontextprotocol npm scope. The most popular are: Filesystem (secure file access with directory sandboxing), GitHub (repo management, PRs, issues), PostgreSQL (database queries), Memory (persistent knowledge graph), Fetch (web content retrieval), Git (repository operations), Sequential Thinking (structured reasoning), Brave Search (web search), Puppeteer (browser automation), SQLite (local database), and Time (timezone utilities). These are well-maintained and guaranteed to follow the MCP specification.
Third-party and vendor servers
Major platforms have released their own MCP servers: Playwright by Microsoft for browser testing, Supabase for database/auth, Sentry for error tracking, Linear for issue management, Notion for workspace access, Slack for messaging, Cloudflare for Workers/KV/R2, and Docker for container management. Context7 provides up-to-date library documentation. These vendor servers are typically maintained by the platform teams and offer deep integration with their services.
Choosing the right servers
Start with 2-3 servers that match your daily workflow. For most developers, Filesystem + GitHub + one database server covers the essentials. Add specialized servers as needed — Playwright for testing, Sentry for debugging production issues, or Slack/Linear for team communication. Each server adds startup time, so avoid installing servers you won't use regularly. You can always add more later without affecting existing configurations.
Frequently Asked Questions
How many MCP servers can I run at once?
There's no hard limit, but each server is a separate process that consumes memory. Most developers run 3-5 servers. If you notice slowdowns, reduce the number of active servers. Claude Desktop and Cursor handle 10+ servers without issues on modern hardware.
Are MCP servers safe to use?
Official @modelcontextprotocol servers are maintained by Anthropic and follow security best practices. Third-party servers vary — check the source code, npm download counts, and GitHub stars before installing. Servers run with your local permissions, so a filesystem server has access to any directory you configure. Always scope access to specific directories rather than giving root access.
Can I build my own MCP server?
Yes. The MCP SDK is available for TypeScript (@modelcontextprotocol/sdk) and Python (mcp). A basic server that exposes tools, resources, or prompts can be built in under 100 lines of code. See the official MCP documentation and examples repository for starter templates.
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